* {
    margin: 0;
    padding: 0;
}

a {
    text-decoration: none;
    color: white;
    font-size: 18px;
}


/* 第一部分 */

#first_backImage {
    width: 100%;
    height: 700px;
    background-image: url(../img/backOne.jpg);
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: fixed;
}

header span {
    margin-right: 20px;
}

header {
    width: 100%;
    height: 90px;
}

#nav {
    padding-top: 60px;
    float: right;
    margin-right: 5%;
}

#middle_text {
    text-align: center;
    color: white;
}


/* 第二部分 */

#second {
    width: 100%;
    height: 400px;
    background-color: white;
}

#second_title {
    margin-top: 80px;
    text-align: center;
}

#second_title span {
    display: block;
    margin: 0 auto;
}

#second_title>span:first-child {
    font-size: 60px;
    color: rgb(198, 198, 198);
    margin-bottom: 20px;
}

#second_title>span:last-child {
    width: 120px;
    height: 10px;
    background-color: rgb(237, 205, 31);
}

#second_middle {
    display: flex;
    justify-content: center;
    margin-top: 40px;
}

#second_middle img {
    width: 300px;
}

#second_middle p {
    padding-left: 20px;
    padding-top: 20px;
    font-size: 25px;
    color: rgb(61, 89, 117);
}

#second_middle>div {
    width: 300px;
    height: 360px;
    background-color: rgb(247, 247, 247);
}

#second_middle>div:nth-child(2) {
    margin: 0 20px;
}


/* 第三部分 */

#third_backImage {
    margin-top: 180px;
    width: 100%;
    height: 700px;
    background-image: url(../img/backThree.jpg);
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: fixed;
    position: relative;
}

#third_left_text {
    position: absolute;
    margin-top: 50px;
    width: 25%;
    height: 600px;
    opacity: 0.8;
    padding-left: 20%;
    padding-right: 5%;
    background-color: white;
}

#third_title {
    padding-top: 30px;
    opacity: 0.8;
}

#third_title>span:first-child {
    font-size: 50px;
    color: black;
}

#third_title>span:last-child {
    display: block;
    width: 150px;
    height: 6px;
    margin-top: 15px;
    background-color: black;
}


/* 第四部分 */

#fourth {
    width: 100%;
}

#fourth_image {
    width: 100%;
}

.fourth_image_wrap {
    width: 60%;
    margin: 0 auto;
    display: flex;
    justify-content: space-around;
    margin-top: 20px;
}

.fourth_image_wrap>div {
    width: 45%;
    background-color: brown;
    height: 300px;
    position: relative;
    overflow: hidden;
}

.fourth_image_wrap>div>img {
    width: 100%;
    height: 100%;
}

.fourth_image_wrap>div>div {
    text-align: center;
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0px;
    background-color: cadetblue;
    opacity: 0.8;
    display: none;
}

.img {
    transform: scale(1.2);
    transition: all 0.4s linear;
}


/* 第五部分 */

#fifth {
    margin-top: 50px;
    width: 100%;
    height: 600px;
    background-color: rgb(198, 198, 198);
}

#fifth>div {
    width: 50%;
    height: 100%;
    float: left;
}

form {
    margin-top: 30px;
}

form>div {
    width: 350px;
    margin: 0 auto;
    text-align: center;
}

form input {
    border: none;
    background-color: rgb(198, 198, 198);
    outline: none;
}

textarea {
    padding-top: 5px;
    resize: none;
    width: 100%;
    height: 100px;
    background-color: rgb(198, 198, 198);
    border: none;
    outline: none;
    border-top: 1px solid rgb(196, 164, 104);
    border-bottom: 1px solid rgb(196, 164, 104);
}

button {
    width: 300px;
    height: 40px;
    background-color: rgb(198, 198, 198);
    border-radius: 20px;
    font-weight: bold;
}

button:hover {
    background-color: rgb(50, 50, 50);
    color: white;
    font-weight: bold;
}